126 The Inheritance of Wing-Colour in Lepidoptera 



'18/ cannot be of any significance, as the ova might very easily have 

 been contaminated before they were received. 



By mating together the F^ heterozygotes, an F^ generation is pro- 

 duced, which consists approximately of one varleyata to three others, 

 either grossulariata or lacticolor. 



I am very much indebted to Mr Raynor for the data of his 1917 

 families, which are included in the above table. They supplement the 

 other figures, and the totals are fairly close to the expected ratio of 3 :1. 



All the parents are grossulariata, but several of them are dark, and 

 the cf parent of 1.17 and the $ parent of 22.17 approach var. hazeleigh- 

 ensis. Since the parents are in a number of cases heterozygous for 

 lacticolor, this variety occui's among the non-melanics in several families. 



The result of mating varleyata to F^ heterozygotes shows an almost 

 equal number of melanic and non-melanic, as follows: 



Varleyata x F^. 

 RR X DR. 



Totals ... 164 116 280(51%) 151 122 273(49%) 



Expectation ... 274-5 274-5 



These families contain one or more ^ ^ which are radiated (see table on p. 135). 



